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US 10,843,702 B2Granted
Methods and systems for oil leak determination
AssigneeFord Global Technologies, LLC
InventorAed Dudar
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for an oil diagnostic. In one example, a method may include intrusively increasing an oil pump displacement to determine if an internal oil leak is occurring. The method may further include adjusting a parking routine to determine if an external oil leak is determining.
Claims18
A method comprising:
- increasing an oil pump output intrusively to a high displacement during a higher engine load in response to an oil volume decreasing at a rate greater than a threshold rate to determine if an internal oil leak is present, wherein higher engine loads include mid- and high-loads, wherein a high-load is greater than a mid-load, and wherein the oil pump output is decreased to a low displacement during the higher engine loads in response to the oil volume decreasing at a rate less than or equal to the threshold rate, wherein the low displacement is less than the high displacement;
- executing an external oil leak diagnostic which includes arranging an autonomous vehicle a length of the autonomous vehicle outside of a parking spot, capturing a first image of the parking spot, arranging the autonomous vehicle the length of the autonomous vehicle outside of the parking spot following a threshold duration, capturing a second image, and comparing gray scale sums of the first image and the second image to detect an external oil leak;
- and
- indicating an oil sensor is degraded in response to an absence of the internal oil leak and the external oil leak.
1 more element
A method executed via a controller comprising computer-readable instructions stored on non-transitory memory thereof that, when executed, enable the controller to execute the method comprising:
- arranging a vehicle outside of a parking spot at a first position;
- capturing a first image of the parking spot via an image capturing device;
- storing the first image in a memory of the controller;
- propelling the vehicle to the parking spot;
- propelling the vehicle outside of the parking spot to a second position after parking the vehicle for a threshold duration;
- capturing a second image of the parking spot;
- storing the second image in the memory of the controller;
- identifying an oil leak based on a comparison of the first image and the second image, wherein the oil leak is determined to be an external oil leak based on a difference between the first image and the second image;
- intrusively increasing an oil pump output and detecting an amount of blue in an exhaust gas to determine if the oil leak is an internal oil leak;
- and
- indicating an oil sensor is degraded in response to an absence of the external oil leak and the internal oil leak.
8 more elements
A system comprising:
- an autonomous vehicle comprising a hybrid engine selectively coupleable to an electric motor;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that, when executed, enable the controller to:
- execute an oil leak diagnostic in response to an oil volume decreasing at a rate greater than a threshold rate;
- the oil leak diagnostic including an internal oil leak diagnostic and an external oil leak diagnostic;
- the internal oil leak diagnostic including intrusively increasing an oil pump output and detecting an amount of blue in exhaust gas to detect an internal oil leak;
- the external oil leak diagnostic including arranging the autonomous vehicle a length of the autonomous vehicle outside of a parking spot, capturing a first image of the parking spot, arranging the autonomous vehicle the length of the autonomous vehicle outside of the parking spot following a threshold duration, capturing a second image, and comparing gray scale sums of the first and second images to detect an external oil leak;
- and
- in an absence of internal and external oil leaks, indicating an oil sensor as degraded.
6 more elements
Dependencies are inferred from the claim text.